Most ducts can be clogged with excessive amounts of dust and debris and/or particles - as much as 40 pounds can be accumulated in a year. These particles are continually cycled through the living space of your home through your supply registers.
Substantial mold growth can be hidden within your home's ductwork and inside other components of your heating system.
The debris accumulation within your ductwork can be the perfect breeding ground for other indoor air contaminants like bacteria, fungi and dust mites. This can lead to significant respiratory issues for asthma and allergy sufferers.
Ductwork can also be infested with vermin such as rodents and insects. It gives them an entry point to every room in your home.
According to the Environmental Protection Agency (EPA:)Your air ducts and heating and cooling systems should be inspected by a professional heating and cooling contractor. Many duct cleaners are not licensed HVAC contractors and are not qualified to service any of your HVAC equipment. "A careless or inadequately trained service provider can damage your ducts or heating and cooling system, possibly increasing your heating and air conditioning costs, or forcing you to undertake difficult and costly repairs or replacement."
Typical cost: $575 Additional $25 per duct after 10 vents or over a year $47.92 PER MONTH
Typical cost: $695 Additional $25 per duct after 14 vents or over a year $57.92 PER MONTH
Typical cost: $855 Additional $25 per duct after 16 vents or over a year $71.25 PER MONTH